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softfloat: Add float32_is_zero_or_denormal() function

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Add a utility function to softfloat to test whether a float32
is zero or denormal.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Peter Maydell 2011-01-14 20:39:18 +01:00 committed by Aurelien Jarno
parent 3bd4be3ada
commit 6f3300ad2b
1 changed files with 5 additions and 0 deletions
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5
fpu/softfloat.h
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@ -336,6 +336,11 @@ INLINE int float32_is_any_nan(float32 a)
return ((float32_val(a) & ~(1 << 31)) > 0x7f800000UL); return ((float32_val(a) & ~(1 << 31)) > 0x7f800000UL);
} }
INLINE int float32_is_zero_or_denormal(float32 a)
{
return (float32_val(a) & 0x7f800000) == 0;
}
#define float32_zero make_float32(0) #define float32_zero make_float32(0)
#define float32_one make_float32(0x3f800000) #define float32_one make_float32(0x3f800000)
#define float32_ln2 make_float32(0x3f317218) #define float32_ln2 make_float32(0x3f317218)